The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2019
Filed:
Aug. 11, 2016
Applicant:
Crystal Pharmatech Co., Ltd., Suzhou, Jiangsu, CN;
Inventors:
Minhua Chen, Jiangsu, CN;
Yanfeng Zhang, Jiangsu, CN;
Kai Liu, Jiangsu, CN;
Po Zou, Jiangsu, CN;
Xiaoyu Zhang, Jiangsu, CN;
Assignee:
Crystal Pharmatech Co., Ltd., Suzhou, Jiangsu, CN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D 405/12 (2006.01); A61K 31/443 (2006.01); A61K 31/47 (2006.01); A61P 11/00 (2006.01);
U.S. Cl.
CPC ...
C07D 405/12 (2013.01); A61K 31/443 (2013.01); A61K 31/47 (2013.01); A61P 11/00 (2018.01); C07B 2200/13 (2013.01);
Abstract
The present disclosure provides crystalline form A of 3-(6-(1-(2, 2-difluorobenzo [d] [1, 3] dioxo-5-yl) cyclopropanecarboxamido)-3-methylpyridin-2-yl) benzoic acid and process of preparation thereof. The crystalline form A has low hygroscopicity, good stability, is convenient to store. It has higher solubility than that of prior art and therefore plays an important role in further optimization and development of the drug.